Gabriel "Kelly" Mannarino was a Mafioso closely associated with Pittsburgh mobster John La Rocca and Florida crime boss Santos Trafficante Jr. Mannarino was part owner of Havana's Sans Souci nightclub in the pre-Fidel Castro era. Based in southwestern Pennsylvania Gabriel was also involved in jukebox racketeering. He testified before the U.S. Senate Rackets Committee in the late 1950s. In 1959 Congressman William Cramer of Florida linked Mannarino to Trafficante and the murder of Mafia enforcer Albert Anastasia on October 25, 1957.